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Supernumerary humeral heads of the biceps brachii muscle revisited
Author(s) -
RodríguezNiedenführ Marc,
Vázquez Teresa,
Choi David,
Parkin Ian,
Sañudo José R.
Publication year - 2003
Publication title -
clinical anatomy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 71
eISSN - 1098-2353
pISSN - 0897-3806
DOI - 10.1002/ca.10060
Subject(s) - biceps , medicine , supernumerary , anatomy , cadaver , humerus
Supernumerary humeral heads of the biceps brachii muscle were found in 27 (15.4%) of 175 cadavers. They were bilateral in five cadavers and unilateral in 22 (8 left, 14 right), giving a total of 32 examples in 350 arms (9.1%). Depending on their origin and location, the supernumerary heads were classified as superior, infero‐medial, and infero‐lateral humeral heads. Previous studies were reviewed using this classification. The infero‐medial humeral head was observed in 31 of 350 (9%) arms and was therefore the most common variation. The superior humeral head was observed in five (1.5%). The infero‐lateral humeral head was the least common variation, observed only in one (0.3%) of 350 arms. A biceps brachii with three heads was observed in 27 of 350 (7.7%) arms and with four heads in five (1.4%) arms. Clin. Anat. 16:197–203, 2003. © 2003 Wiley‐Liss, Inc.